Question

我想创建一个.mp3文件和字符串的arraylist。如果arraylist中的字符串被随机数调用，则播放特定的mp3文件。我可以制作一个充满.mp3文件和字符串的arraylist，以便可以同时调用它们，或者我可以创建单独的数组列表。或者甚至不使用.mp3文件的ArrayList？谢谢。

ArrayList<String? words = new ArrayList<String>
words.add("Hello World");

//On Button Click
//Generates randomNumber Integer
//randomNumber=1
//SetText to "Hello World" and play .mp3 that says "Hello World" simultaneously and put thread to sleep for .mp3 length

用最少量的硬编码实现这一目标的最佳方法是什么？

Answer 1

你想要的是一个Map，它将字符串与MP3文件路径相关联。

Answer 2

您可以按如下方式创建自己的自定义对象arraylist ..

public class SongInfo
{
    String songName;
    String songPath;


    public SongInfo(String songName,String songPath){
        this.songName = songName;
        this.songPath = songPath;

    }
}

ArrayList<SongInfo> customSongList = new ArrayList<SongInfo>();

Answer 3

制作自己的歌曲对象并从中随机拾取歌曲

public class Player {

    public static void main(String[] args) {
        Player player = new Player();
        //populate music in your arrayList
        List<Song> album = player.populateMusicList();
        //play
        for (int i = 0; i < 10; i++) {
            player.play(album);
        }
    }

    public void play(List<Song> album) {
        System.out.println("playing --" + album.get(this.fetchMusicRandomly(album)));
    }

    private int fetchMusicRandomly(List<Song> album) {
        return ThreadLocalRandom.current().nextInt(0, album.size());
    }

    private List<Song> populateMusicList() {
        List<Song> musicBucket = new ArrayList<Song>();
        musicBucket.add(new Song("musicName-1", "pathtomp3File"));
        musicBucket.add(new Song("musicName-2", "pathtomp3File"));
        musicBucket.add(new Song("musicName-3", "pathtomp3File"));
        musicBucket.add(new Song("musicName-4", "pathtomp3File"));
        musicBucket.add(new Song("musicName-5", "pathtomp3File"));
        musicBucket.add(new Song("musicName-6", "pathtomp3File"));
        musicBucket.add(new Song("musicName-7", "pathtomp3File"));
        musicBucket.add(new Song("musicName-8", "pathtomp3File"));
        musicBucket.add(new Song("musicName-9", "pathtomp3File"));
        musicBucket.add(new Song("musicName-10", "pathtomp3File"));
        return musicBucket;
    }

    class Song {

        public Song(String name, String pathToMp3) {
            this.name = name;
            this.pathToMp3 = pathToMp3;
        }
        String name;
        String pathToMp3;

        public String getName() {
            return name;
        }

        public String getPathToMp3() {
            return pathToMp3;
        }

        @Override
        public String toString() {
            StringBuilder result = new StringBuilder();
            result.append(" {Name: " + name + " }");
            result.append(" {Path To Mp3file: " + pathToMp3);
            result.append("}");
            return result.toString();
        }
    }
}

Android，创建.mp3文件的arraylist？

3 个答案: